I don't know it off the top of my head but if you start from the top left of the options, meaning the row of three on top, it starts at zero and ends at 2. The second row starts at 3 and ends at 4, third row is 5 and 6, and the bottom row is 7, 8, and 9. So it would look something like this (sorry for all the periods but it's the only way the forum will allow me to space everything):